Coherent light generators – Particular component circuitry – For driving or controlling laser
Reexamination Certificate
2007-08-03
2010-06-08
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular component circuitry
For driving or controlling laser
C372S097000
Reexamination Certificate
active
07733933
ABSTRACT:
Included are: a gain chip having a gain unit and a phase control region; a current supply for causing a positive current to flow to the phase control region; a voltage supply for applying a bias voltage to the phase control region; and a control unit for selectively driving the current supply or the voltage supply depending on a direction of the wavelength shift. The control unit drives the current supply when a laser wavelength is to be shifted to a shorter wavelength side from a wavelength with the current supply and the voltage supply being turned off, and drives the voltage supply when the laser wavelength is to be shifted to a longer wavelength side from a wavelength with the current supply and the voltage supply being turned off.
REFERENCES:
patent: 5119393 (1992-06-01), Oka et al.
patent: 6738398 (2004-05-01), Hirata et al.
patent: 2005/0213618 (2005-09-01), Sochava et al.
patent: 2006-245346 (2006-09-01), None
Tatsuo Kunii et al.; Spectral characteristics for all MQW˜-1.5 um DBR lasers; 1991 Springtime National Convention of the Institute of Electronics, Information and Communication Engineers (IEICE); Semiconductor Technology Laboratory, Oki Electric Co., Ltd. pp. 1-5.
Tatsuo Kunii, et al.; Spectral characteristics for all MQW-1.5 um DBR lasers; 1991 Springtime National Convention of the Institute of Electronics, Information and Communication Engineers (IEICE); Semiconductor Technology Laboratory, Oki Electric Co., Ltd. pp. 1-5.
Arimoto Hideo
Ito Kazuhiro
Sasaki Hiroyasu
Antonelli, Terry Stout & Kraus, LLP.
Harvey Minsun
Opnext Japan, Inc.
Stafford Patrick
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